117results about How to "Promote exchange" patented technology

The invention provides a helmet standard wearing detection method based on improved YOLOv8, and belongs to the technical field of computer vision target detection. The technical problem that an existing detection algorithm cannot judge whether the safety helmet is worn normatively or not is solved. According to the technical scheme, the method comprises the following steps: S1, collecting sample data; s2, a variable convolution Deform ConvolutionV2 is adopted to replace a traditional convolution, and a variable convolution is adopted to replace the traditional convolution; s3, DCNV2 improvement based on MPCA is carried out; s4, an improved multi-scale feature fusion module; and S5, training the improved YOLOv8 network model by using the helmet standard wearing data set to obtain a trained model. The beneficial effects of the invention are that the method not only helps a manager to effectively supervise the wearing condition of the safety helmet on the working site, but also provides a new idea and example for the target detection technology based on deep learning in the field of safety helmet detection.

The invention relates to the technical field of enameled wire cooling, in particular to an enameled wire cooling device for enameled wire production. The water cooling device comprises a water cooling box, cooling liquid is contained in the water cooling box, at least two sets of conveying assemblies are arranged in the water cooling box, each conveying assembly comprises a rotating motor arranged on the side wall of the water cooling box, the output end of each rotating motor penetrates through the water cooling box, a transmission roller is arranged at the end of each rotating motor, a limiting roller is arranged above each transmission roller, and an adjusting assembly is arranged above each limiting roller; varnished wires pass through the through holes formed in the sponge mat and are adsorbed by the sponge mat through water on the surface of the through holes, so that the varnished wires are automatically dried, when much water is adsorbed in the sponge mat, the telescopic rods are shrunk by pressing the pressing plates, and the compression springs are compressed in the shrunk process of the telescopic rods; and water adsorbed in the sponge pad overflows under the extrusion force of the pressing plate, so that the cooled enameled wire is quickly dried and dehumidified.

The invention discloses a micro-channel jet reactor. The micro-channel jet reactor comprises a sample introduction unit, a main mixing unit and a reaction unit which are sequentially communicated, the main mixing unit comprises a first inner pipe and a first outer pipe arranged outside the first inner pipe in a sleeving manner; a first annular space is formed between the first inner pipe and the first outer pipe; the sample introduction unit is communicated with the first inner pipe; a second sample inlet is formed in the first annular space, and a plurality of through holes are formed in the first inner pipe; the reaction unit comprises a second inner pipe and a second outer pipe arranged outside the second inner pipe in a sleeving manner; a second annular space is formed between the second inner pipe and the second outer pipe; the first inner pipe is communicated with the second inner pipe; during use, condensate is arranged in the second annular space. The reactor can effectively improve the mixing uniformity degree of reaction liquid, meanwhile, the reaction temperature is controlled, and the reaction rate and selectivity are ensured.

The utility model discloses a large-scale steel structure assembly type multifunctional artificial fish reef with high environment adaptability to deepwater, which relates to the technical field of marine ranch construction, and comprises a plurality of groups of support column components, each support column component comprises a first upright post, a second upright post and a third upright post which are sequentially lowered from inside to outside, the first stand column, the second stand column and the third stand column are detachably connected through a plurality of first cross beams, the multiple sets of supporting column assemblies are arranged at equal intervals in the circumferential direction and connected through a plurality of second cross beams, and ecological flow guide plates are detachably assembled on the inner second cross beam and the outer second cross beam correspondingly. The bottoms of the first stand column, the second stand column and the third stand column are each provided with a stable anchor disc. The problems of subsidence and deposition of the reef body on the soft soil foundation are solved, and the adaptive capacity of the reef body to the environment is improved; the function of various flow field conditions is realized through the flexibly adjustable ecological flow guide plate, and the required flow field effect can be formed by adjusting the distribution and angle of the ecological flow guide plate according to the flow field requirement.

The invention discloses a method for designing a bionic bone scaffold based on wall thickness mixed gradient change, and belongs to the technical field of bionic bone scaffolds. By designing the wall thickness mixed gradient function, the lattice unit can have wall thickness gradient change in the radial direction and the axial direction at the same time, so that the porosity also has gradient change in three directions at the same time, and the defect that a bone scaffold is designed by using a lattice material (beam unit) unit and a TPMS unit in the prior art can be well overcome; and the stent better conforms to the natural bone structure and mechanical property requirements. The designed bionic bone scaffold is excellent in mechanical property, high in compression resistance and deformation resistance and capable of promoting cell growth and tissue regeneration.

The invention discloses a copper wire gold plating treatment process, which belongs to the technical field of integrated circuits. The process comprises the following steps: performing surface cleaning treatment on a palladium-plated copper wire and then immersing the wire in a gold plating solution for gold plating treatment to obtain a gold-plated palladium copper wire; drawing and thinning the gold-plated palladium copper wire to a preset diameter, and then sequentially performing annealing treatment and surface cleaning treatment to obtain the gold-plated palladium copper wire; the gold plating solution comprises a leveler, the leveler takes a polyhydroxy spirobiindene rigid structure as a skeleton, and uses a Mannich reaction to graft 3-hydroxypiperidine with aminomethyl at the α active hydrogen position of the skeleton, and then introduces bromine atoms into the skeleton through a bromination reaction and derives them into a boric acid pinacol ester group, and finally introduces a dithiophene benzothiadiazole structure into the skeleton through a Suzuki coupling reaction to obtain the gold-plated palladium copper wire; the invention adds the leveler into the gold plating solution to improve the bonding strength and flatness of the coating so as to meet the copper wire bonding packaging requirements.

The invention discloses zero-valent iron shell reinforced microbial immobilized particles as well as preparation and application thereof, and belongs to the technical field of wastewater treatment. According to the preparation method, anaerobic digestion bacteria and a zero-valent iron reinforced material are embedded in porous organic gel formed by cross-linking polymerization of polyvinyl alcohol or sodium alginate in a layered manner, so that stress of an external poor water quality environment and the zero-valent iron material on microorganisms is reduced; in the prepared zero-valent iron shell reinforced microbial immobilized particle, the shell containing the zero-valent iron can protect microorganisms from being disturbed by external adverse environmental conditions, the environmental adaptability of the microorganisms is improved, and meanwhile the biological activity of the microorganisms in the porous inner core is reinforced; on the other hand, the biological toxicity of the zero-valent iron material to microorganisms is reduced, and the broad-spectrum applicability of the zero-valent iron is improved.

The invention discloses a coal-series solid waste ceramsite-based water surface crop planting device and method for a coal mining subsidence water area, and the device comprises a plurality of ceramsite floating beds which are formed by connecting a plurality of ceramsite floating plate units through connecting pieces and are fixed through vertical fixing piles which are arranged at intervals; planting holes used for containing planting pots are formed in the inner areas of the ceramsite floating plate units, substrate layers composed of soil and ceramsite of different particle sizes are arranged in the planting pots, and appropriate aquatic economic crops are planted in the substrate layers. According to the coal-series solid waste ceramsite-based water surface crop planting device and method for the coal mining subsidence water area, a new solution is provided for solving the ecological environment and agricultural production problems of the coal mining subsidence water area through comprehensive utilization of waste resources and an ecological restoration technology.

The invention provides a complex terrain three-dimensional wind field prediction method and system based on a graph neural network, and relates to the field of wind field prediction.The complex terrain three-dimensional wind field prediction method comprises the steps that measurement data and terrain data are obtained, simulation, sampling and data fusion are conducted, and input information is obtained to be trained to obtain a graph diffusion model; determining a first wind field distribution diagram, segmenting the first wind field distribution diagram to construct a plurality of sub-diagrams, adding a center node to each sub-diagram, and performing information exchange to obtain a second wind field distribution diagram; and on the basis of a Graphformer model, node data are updated in an autoregression mode, and wind field distribution prediction information at the next moment is obtained. According to the method, in the process of wind field distribution prediction based on the graph diffusion model obtained through training, simulation processing is not needed, calculation is faster and more efficient based on a pure neural network algorithm, learning and exchange of long-range information and global information are promoted by establishing the center node, and long-term prediction of a complex three-dimensional wind field is achieved through the Graphformer model.

The invention relates to the technical field of farmland water conservancy engineering, in particular to a rubble retaining wall irrigation system for improving farmland water circulation. The rubble retaining wall irrigation system for improving farmland water circulation specifically comprises a ditch, a filter screen layer, a pebble layer, an adsorption layer, a medium-coarse sand layer and geotechnical cloth which are laid on the left side and the right side of the bottom of the ditch, retaining wall layers located on the two sides above the geotechnical cloth, and a paving layer located between the retaining wall layers, undisturbed soil is backfilled on the surface of the paving layer. The device has the advantages of being capable of effectively preventing cultivation soil loss, good in water circulation performance and convenient for water body exchange among farmland drainage ditches, farmland ditches and soil.

The invention discloses a silane modified composite electrochromic material and a preparation method thereof, and relates to the field of electrochromic materials, and the silane modified composite electrochromic material is composed of tungsten trioxide, polyaniline, a titanium element, a tantalum element, an anilino silane coupling agent, an organic tin catalyst, a conductive substrate, an ethanol aqueous solution and an aniline electrolyte. The tungsten trioxide-titanium dioxide is doped with elements such as titanium and tantalum, the insertion / output quantity of Li < + > can be increased through proper doping, the optimized tungsten trioxide-titanium dioxide further has the rapid dynamic property and the cycling stability, the double-layer composite thin film is characterized in that the inner layer is a tungsten trioxide nanopore array, and the outer layer is a sputtering-deposited tungsten trioxide-titanium doped film; therefore, the response speed and the coloring efficiency can be improved, and the electrochromic performance of the tungsten trioxide film can be improved.

The invention provides a water treatment system combining a coupled anoxic biological filter and a constructed wetland, which belongs to the technical field of water treatment, and has the technical key points that sewage is collected by a pipe network, flows into a water collecting tank and then enters a regulating / anoxic tank through a lifting pump, a carrier is provided for microorganisms through a solid carbon source in the tank, and slow-release supplement of the carbon source is realized at the same time; then, the sewage is conveyed to a biological filter and a contact oxidation pond through a lifting pump after the denitrification reaction is enhanced to remove total nitrogen, COD and ammonia nitrogen are removed through a carbon oxidation reaction and a nitration reaction, effluent enters an efficient clarification pond, most of total phosphorus and SS are removed through chemical phosphorus removal and a coagulation precipitation method, the effluent overflows into an artificial wetland, and the effluent is subjected to plant-microorganism-filler comprehensive treatment, so that the effluent is subjected to denitrification treatment. And pollutants are deeply purified and discharged after reaching the standard. By adopting the water treatment method provided by the invention, the effluent quality can be improved to the first-grade B emission standard.

The utility model belongs to the technical field of veterinary drug liquid preparation production devices, and particularly relates to a veterinary drug liquid preparation uniform mixing device which comprises a tank body, connecting blocks are fixedly connected to the upper surface of the tank body, a motor is fixedly connected between every two adjacent connecting blocks, and the output end of each motor is fixedly connected with a first rotating shaft. A connecting piece is fixedly connected to the outer surface of the first rotating shaft, an inner gear ring is fixedly connected to the end, away from the first rotating shaft, of the connecting piece, first stirring blades are fixedly connected to the outer surface of the first rotating shaft, a fixing strip is fixedly connected to the inner surface of the tank body, and a second rotating shaft is movably installed on the upper surface of the fixing strip. The liquid medicine mixing tank is reasonable in structure, liquid medicine in the tank body forms a complex flowing form through stirring in different directions, strong convection and shearing are formed in the middle of the tank body through interaction of two kinds of circulation, exchange between the upper portion and the lower portion of the liquid medicine is promoted, and the mixing effect is improved.

The utility model relates to sewage treatment field especially, it is a kind of single tower low pressure stripping device for sewage treatment, including support frame, shell, gas outlet, sewage inlet, battens and gas outlet component etc., support frame is connected with shell, shell upside is connected with gas outlet, shell upper portion left side is connected with sewage inlet, shell middle part inboard is connected with multiple battens, support frame lower part is equipped with the gas outlet component for treating acidic component in sewage. The utility model discloses through sewage S shape along batten flows to shell lower part, while sewage will promote impeller and cleaning frame rotation to scrape the impurity on batten, so that water vapor moves upward, flows through air inlet hole and contacts sewage to treat sewage, so that it can remove acidic component when sewage flows and treat, promote cleaning frame rotation to scrape the impurity on batten, prevent air inlet hole blockage, enhance gas exchange effect, improve sewage treatment efficiency.

The utility model provides a kind of fruit packing environment-friendly paper box, including box body and box cover, the box body includes bottom plate, the top of the bottom plate is fixedly connected with energy-absorbing cylinder, the energy-absorbing cylinder is hollow structure, the inboard of energy-absorbing cylinder is equipped with multiple elastic supports, the top of the elastic support is equipped with the containing groove for placing fruit, the sidewall of the elastic support is equipped with the air passage that is connected with the inside of the containing groove and is penetrated, the sidewall of the energy-absorbing cylinder is equipped with the air hole that is mutually matched with the air passage symmetrically.The utility model is through being equipped with energy-absorbing cylinder and elastic support, and the energy-absorbing cylinder of hollow structure can absorb external impact force by self deformation, and elastic support can further disperse impact force by elastic deformation, so as to avoid that fruit is directly squeezed and collided, greatly improves the buffering protection performance of box body, and each fruit is placed in independent containing groove, and also can avoid mutual collision between fruits due to transportation shaking.

This utility model relates to the field of transfer box technology and discloses a hollow board turnover box, comprising: a box body, which is composed of multiple hollow boards spliced ​​together, and the hollow boards have honeycomb-shaped hollow cavities inside; reinforcing columns are provided at the four corners of the box body, and the reinforcing columns are fixedly connected to the hollow boards, and the reinforcing columns also have hollow cavities inside; a groove is formed on the top of the box body; a protrusion is installed on the bottom of the box body, and the shape of the groove matches the shape of the protrusion; multiple ventilation holes are evenly formed on the side walls of the box body; and a moisture-proof net is installed in the ventilation holes. In this utility model, by setting the box body, groove, and protrusion, the honeycomb-shaped hollow cavities inside the box body ensure lightweight and high-strength support, while the embedded structure of the protrusion and groove and the design of the rubber anti-slip pad prevent lateral sliding or tipping during stacking, thereby improving the utilization rate of storage space and ensuring the stability of logistics transportation.

This application relates to an electroplated reinforced hanger, comprising a main shaft and multiple annular bases vertically distributed along the main shaft. Multiple hook assemblies are arranged around the annular bases. Each hook assembly includes a support rod, an arc-shaped elastic element, and an S-shaped elastic element. The arc-shaped and S-shaped elastic elements are connected to the support rod, with the arc-shaped elastic element positioned above the S-shaped elastic element. The arc-shaped elastic element is configured to abut against the inner wall of the cylindrical material through inward radial elastic deformation, while the S-shaped elastic element is configured to bend upward and abut against the outer wall of the cylindrical material through outward radial elastic deformation. By incorporating the arc-shaped and S-shaped elastic elements, the arc-shaped elastic element abuts against the inner wall of the material with its toughness, while the S-shaped elastic element undergoes outward radial elastic deformation. Through bidirectional elastic clamping, the cylindrical material can be firmly fixed and will not fail due to slight differences in its diameter, effectively preventing the risk of detachment under severe liquid flow impact.

The invention is about a flexible expandable automation device (1), having a main control unit (2), having further at least two I / O-units (3, 4), said I / O-units (3, 4) being connected to the main control unit (2) and to each other via an I / O-bus (6), said I / O-bus (6) working according to the daisy-chain technique, wherein the I / O-bus (6) has a bus signal line (7) and a daisy-chain-control-line (8), wherein each I / O-unit (3, 4) has a daisy-chain-control-IN-port (21) which is configured to receive a daisy-chain-control-signal as daisy-chain-control-IN-signal (24) and a daisy-chain-control-OUT port (23) which is configured to deliver the daisy-chain-control-signal as daisy-chain-control-OUT-signal (25) to the next adjacent I / O-unit. Each I / O-unit (3, 4) has an I / O-module carrier (9) and a pluggable and unpluggable I / O-module (10), wherein the daisy-chain-control-IN-port (21) and the daisy-chain-control-OUT-port (23) are part of the I / O-module carrier (9), and each I / O-module-carrier (9) has a hot-swap-control unit (19), said hot-swap control unit (19) being configured, in case of an unplugged I / O-module (10), to automatically bridge the interrupted daisy chain.

This invention provides a high-heat-dissipation battery component for new energy vehicles, belonging to the field of new energy vehicle heat dissipation battery technology. It includes a protective shell, inside which a cooling module is installed. The cooling module is used to cool the entire battery module. The battery module consists of a mounting box and battery cells. The battery cells are installed in mounting slots within the mounting box. A top plate is installed on the top of the battery module. The cooling module is connected to a serpentine cooling pipe, which has several adjusting components. Several adjusting components are arranged between adjacent sections of the serpentine cooling pipe. This invention, through the corresponding combination design of the cooling module, the serpentine cooling pipe and adjusting components, and the serpentine cooling pipe and adjusting components, achieves dual heat dissipation functions: overall cooling of the battery module and precise heat dissipation of individual battery cells, thus improving maintenance convenience.

This invention relates to the field of flue gas treatment technology, specifically to a low-temperature demisting and dewhitening synergistic purification device for waste incineration flue gas treatment. The device includes a housing assembly, inside which a low-temperature demisting cylinder, a synergistic dewhitening cylinder, and an emission cylinder are sequentially arranged, all three connected by a common ventilation pipe. A first spiral guide rod and a second spiral guide rod are rotatably installed in the ventilation pipe located on one side of the low-temperature demisting cylinder and at the interval between the low-temperature demisting cylinder and the synergistic dewhitening cylinder, respectively. The end of the first spiral guide rod extends outside the ventilation pipe and is fixedly mounted with a drive motor. The low-temperature demisting cylinder contains a first flow equalization plate, a filter disc, a condenser tube assembly, and a demisting component. This invention connects the low-temperature demisting cylinder, the synergistic dewhitening cylinder, and the emission cylinder in series to form a three-stage synergistic treatment process, achieving stratified purification and dewhitening of flue gas, significantly improving the purification efficiency and operational stability of waste incineration flue gas, while reducing energy consumption and maintenance costs.

The invention relates to a control system and a control method for automatic ventilation of a vehicle. The system comprises a mode button, a rainfall sensor and / or a windscreen wiper detection module, a vehicle speed sensor, an air conditioner control system and an automatic ventilation controller. The automatic ventilation controller determines whether an automatic ventilation mode is started or not according to operation received by the mode button. Whether it rains outside the vehicle is determined according to the rainfall outside the vehicle detected by the rainfall sensor and / or the windscreen wiper operation state detected by the windscreen wiper detection module; determining whether the vehicle speed is within a preset range according to the vehicle speed detected by the vehicle speed sensor; according to the vehicle interior temperature detected by the air conditioner control system and the received set temperature, whether the vehicle interior temperature is close to the set temperature or not is determined; when it is determined that the automatic ventilation mode is started, no rain exists outside the vehicle, the vehicle speed is within the preset range, and the temperature inside the vehicle is close to the set temperature, the vehicle is controlled to conduct ventilation. Automatic ventilation of the vehicle can be achieved.

The invention relates to the technical field of dangerous solid waste treatment and resource utilization, in particular to an aluminum electrolysis overhaul slag fluoride enhanced leaching and resource recycling method. Comprising the following steps: adding pretreated overhaul slag into a complexing reaction solution of boric acid containing a dispersing agent and gluconate, and pulping; sealing the system, heating, and implementing pulse type micro-negative pressure degassing operation in which vacuumizing and normal pressure recovery are alternated during constant-temperature leaching; after the reaction is finished, carrying out thermal-state solid-liquid separation and tailing washing, and merging to obtain clear filtrate; crystal seeds are added into the filtrate, an aluminum source solution is dropwise added, the pH value is increased, solid-liquid separation is performed after constant-temperature curing, and synthetic cryolite is obtained; and supplementing the pH buffer agent to the clear liquid and then circularly returning to the liquid preparation process. According to the method, fluorine and aluminum are cooperatively extracted under the weak acid condition, generation of silicic acid gel is inhibited, equipment corrosion is reduced, mass transfer in pores is enhanced in combination with micro-negative pressure operation, and low-energy-consumption recovery of fluoride salt and closed-loop circulation of a working solution are achieved through pH regulation and control.

The utility model relates to the technical field of DC power supplies, and discloses an industrial special isolation DC power supply with overload protection, which comprises a power box and an overload protection module, a fan is arranged on the plane of one side of the power box perpendicular to the ground, strip-shaped grooves are arranged on the planes of the other three sides of the power box perpendicular to the ground, and the overload protection module is arranged in the strip-shaped grooves. Wherein a display screen, a button, an adjusting knob and an output interface are arranged on the upper portion of the front face, the output interface is electrically connected with a circuit integration module in the power box through a wire, and the circuit integration module comprises an input filtering module, an AC / DC conversion module, an isolation transformer, an overload protection module and a voltage stabilization output module. The overload protection module is used for monitoring output current in real time and cutting off power supply when the output current exceeds a rated value, and through the arrangement of the overload protection module, when the circuit current exceeds a set threshold value, the power supply is automatically cut off, so that equipment damage or fire risk is prevented, and the safety of the power supply module and load equipment under an abnormal working condition is ensured.

This invention discloses a method for preparing and applying chitosan-encapsulated CoCe layered double hydroxide CoCe-LDH. This material can achieve rapid and efficient degradation of roxarsone and removal of the resulting inorganic arsenic. In this material, LDH is encapsulated by chitosan, resulting in a sheet-like material. Chitosan can disperse active sites and adsorb and enrich PMS, while LDH can transfer PMS ions into the anion layer through anion exchange, thereby increasing the active sites. After coupling with the material, PMS is specifically converted to... 1 O2 accelerates the degradation rate.

The utility model discloses a novel slurry pump sealing device relates to mechanical seal technical field, including rotating part and stationary part: rotating part is by medium side dynamic ring, shaft sleeve and pump shaft, and medium side dynamic ring is through the pin peg and is equipped with in the outer of shaft sleeve, and shaft sleeve is pressed in the impeller end face through the hug ring, stationary part contains medium side static ring, medium side push ring and atmospheric side gland, and medium side static ring is connected with push ring through the pin peg, and push ring is axially connected with atmospheric side gland through transmission pin, and atmospheric side gland is fixed in the pump cover. The spring is arranged between atmospheric side gland and medium side push ring, and medium side dynamic ring and static ring are pushed and abut tightly and seal. Medium side dynamic ring diameter D1 is less than medium side push ring diameter D4, and greater than medium side static ring diameter D3, forms positive balance - reverse unbalanced structure, and increases the closed force, and atmospheric side seal is established between stationary part and shaft sleeve, and contains atmospheric side dynamic ring seal that rotates with shaft sleeve, atmospheric side static ring seal that is fixed in atmospheric side gland, compact structure, saves the space.

The utility model discloses a wooden packing box with a moistureproof function, which relates to the field of wooden packing boxes and comprises a packing box body, grooves are arranged on two sides of the packing box body, sliding baffles are matched inside the two grooves in an up-and-down sliding mode, a pulling handle is inserted on the sliding baffles, and the pulling handle is connected with the packing box body. The side face of the packaging box body is provided with an inserting groove allowing the pulling handle to penetrate through, the two ends of the pulling handle extend out of the two sides of the sliding baffle correspondingly, the sliding baffle is provided with a through groove allowing the pulling handle to penetrate through, and when air in the packaging box body needs to be exchanged with air outside, the sliding baffle can be moved upwards, so that the inserting groove is exposed outside; according to the packaging box, external air can conveniently enter the packaging box body, internal moisture is exhausted, and therefore the moisture-proof effect is achieved, due to blocking of the side faces of the packaging box body, the pulling handle and the front baffle can stretch out of the sliding baffle, and two persons can conveniently lift the packaging box body to move and transport through the protruding pulling handle.

This utility model discloses an apparatus for plant genetic transformation culture, comprising a culture dish and culture bottle caps used in combination. The side of the culture dish is provided with graduations, including a minimum graduation for subculture, an intermediate graduation for differentiation culture, and a maximum graduation for rooting culture. The culture bottle caps include subculture bottle caps, differentiation culture bottle caps, and rooting culture bottle caps, each with ventilation holes at the top. This apparatus allows for precise control of the culture medium volume, avoiding waste and effectively reducing culture costs; it also improves the versatility of the apparatus, expanding its application range; and it facilitates observation and gas exchange, promoting healthy plant growth.

The utility model relates to the technical field of calcium carbonate processing, and discloses an aging device for processing nano calcium carbonate, which comprises a bottom plate, one side of the top of the bottom plate is fixedly connected with an aging tank, the top of the aging tank is fixedly connected with a first servo motor, and the output end of the first servo motor is fixedly connected with a rotating rod. Scraping plates are fixedly connected to the two sides of the top of the outer ring of the rotating rod, the outer ring of the rotating rod penetrates through and is rotationally connected with a shell, a first bevel gear is rotationally connected to the top of the inner wall of the shell, and the inner wall of the first bevel gear is fixedly connected with the rotating rod. According to the nano calcium carbonate aging device disclosed by the utility model, through the matching of the aging tank, the first servo motor, the rotating rod, the scraping plate, the shell, the first bevel gear, the second bevel gear, the stirring rod, the water tank, the water pump and the spray head, raw materials in the aging tank can be fully overturned and stirred, so that the raw materials are uniformly mixed in the aging process, and the processing quality of nano calcium carbonate is favorably improved.

The present invention provides a montmorillonite-reinforced hybrid fiber-bonded 3D printed implant, which is composed of a 3D printed stent with a polydopamine coating and a montmorillonite-reinforced hybrid fiber, wherein the 3D printed stent with a polydopamine coating has mutually interpenetrating micrometer-level macropores, and the montmorillonite-reinforced hybrid fiber is bonded to the 3D printed stent with a polydopamine coating and distributed in the micrometer-level macropores of the 3D printed stent with a polydopamine coating, forming micrometer-level small pores in the micrometer-level macropores; the montmorillonite-reinforced hybrid fiber is formed by multiple chemical reactions of a polymer material having a catechol functional group, collagen and micrometer-level montmorillonite; the polydopamine coating on the surface of the 3D printed stent with a polydopamine coating and the montmorillonite-reinforced hybrid fiber are bonded together by multiple chemical bonds and intermolecular forces. The present invention also provides a preparation method of the above-mentioned implant and its application in the field of bone repair.

The utility model relates to a multi-shaft grinding and kneading device which comprises a shell and a power mechanism, the shell is provided with a feeding port and a discharging port, a cavity is formed in the shell and comprises at least two cavities with overlapping areas, a rotating shaft assembly is arranged in each cavity, a cavity is formed in each rotating shaft assembly, and the power mechanism is arranged in the cavity. A temperature control material inlet and a temperature control material outlet are formed in the rotating shaft assembly, a kneading assembly is fixedly arranged on the rotating shaft assembly, the power mechanism is connected to the rotating shaft assembly, and when the rotating shaft assembly rotates under the action of the power mechanism, the kneading assembly can rotate in the overlapping area. According to the kneading device, due to the fact that the different cavities have the overlapping areas, materials in the different cavities can be rapidly exchanged, collided and mixed in the overlapping areas, the materials can be circulated in the cavities for multiple times, and therefore the purpose of mixing and homogenizing is achieved.